---
title: "Simple visual reaction time: 250 ms"
description: "Simple visual reaction time: typically 250 ms, really 200 ms to 300 ms. What is measured, and why it counts as a reaction."
url: https://atoneplace.net/reaction-time/visual-reaction-time/
site: "At One Place"
---

# Simple visual reaction time

**Simple visual reaction time: 200 ms–300 ms**

Reaction — a decision, via the brain

This is the number people mean by "reaction time", and the honest answer for a healthy adult is 200 to 300 milliseconds with the mean near 250. Vision is the slowest of the three main senses to react to because the retina performs a chemical transduction before any signal leaves the eye, which costs time no other sense pays. The distribution is right-skewed: an individual has a hard floor and a long tail of slow trials, so the median is a better summary than the mean and almost nobody reports it.

## The numbers

- **Typical:** 250 ms
- **Range:** 200 ms to 300 ms
- **What it is:** Reaction — a decision, via the brain
- **What is measured:** Press a button as soon as a light appears. One stimulus, one response, no choice to make.
- **How it was measured:** Laboratory apparatus with a dedicated response button. Browser-based tests add 20 to 50 ms of display and input latency and cannot be compared with these figures.

## Why this is a reaction

A reaction is a decision: signal in, processing, movement out. The floor for a human is around 150 milliseconds, and anything measured below about 100 ms is anticipation rather than response.

## Where it sits against everything else

*Reflexes at the top, reactions in the middle, design values off the end of the scale.*

- Vestibulo-ocular reflex — Reflex: 10 ms
- Knee-jerk (patellar) reflex — Reflex: 22 ms
- Latency added by your screen and mouse — Physical limit: 35 ms
- Blink reflex — Reflex: 40 ms
- Withdrawal reflex — Reflex: 90 ms
- Time a jab takes to land — Physical limit: 110 ms
- Sprint start reaction — Reaction: 140 ms
- Simple tactile reaction time — Reaction: 155 ms
- Simple auditory reaction time — Reaction: 170 ms
- Professional gamer reaction time — Reaction: 190 ms
- Formula One start reaction — Reaction: 200 ms
- Simple visual reaction time — Reaction: 250 ms
- How reaction time changes with age — Reaction: 250 ms
- What sleep loss does to reaction time — Reaction: 300 ms
- What alcohol does to reaction time — Reaction: 320 ms
- Recognition reaction time — Reaction: 340 ms
- Choice reaction time — Reaction: 380 ms
- Time to hit a 95 mph fastball — Physical limit: 400 ms
- Time a goalkeeper has on a penalty — Physical limit: 450 ms
- Time to play a 90 mph delivery — Physical limit: 500 ms
- Driver reaction to an expected event — Reaction: 850 ms

## The basic senses

| What | Typical | Range | Kind |
| --- | --- | --- | --- |
| Simple tactile reaction time | 155 ms | 130 ms–190 ms | Reaction |
| Simple auditory reaction time | 170 ms | 140 ms–200 ms | Reaction |
| Recognition reaction time | 340 ms | 280 ms–450 ms | Reaction |
| Choice reaction time | 380 ms | 300 ms–500 ms | Reaction |

## Common questions

### How long is simple visual reaction time?

Typically 250 ms, with a real range of 200 ms to 300 ms. Press a button as soon as a light appears. One stimulus, one response, no choice to make.

### Is that a reflex or a reaction?

Reaction — a decision, via the brain. A reaction is a decision: signal in, processing, movement out. The floor for a human is around 150 milliseconds, and anything measured below about 100 ms is anticipation rather than response.

### Does the measurement method matter?

Laboratory apparatus with a dedicated response button. Browser-based tests add 20 to 50 ms of display and input latency and cannot be compared with these figures.

## Related pages

- [Simple tactile reaction time](https://atoneplace.net/reaction-time/tactile-reaction-time/)
- [Simple auditory reaction time](https://atoneplace.net/reaction-time/auditory-reaction-time/)
- [Recognition reaction time](https://atoneplace.net/reaction-time/recognition-reaction-time/)
- [Choice reaction time](https://atoneplace.net/reaction-time/choice-reaction-time/)
- [A reflex is not a reaction](https://atoneplace.net/reaction-time/reflex-vs-reaction/)
- [Stopping distance at every speed](https://atoneplace.net/reaction-time/stopping-distance/)
- [Measure your own reaction time](https://atoneplace.net/tools/reaction-time-test/)

## Sources

- A comparative study of visual and auditory reaction times on the basis of gender and physical activity levels — Jain et al., International Journal of Applied and Basic Medical Research 5(2), 2015 (https://doi.org/10.4103/2229-516X.157168)